When the index name is not specified, optimizer picks the cheapest single XML index access plan.

如果未指定索引名，优化器将选用成本最低的 XML 索引访问计划。

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For example, whether ORDER BY or GROUP BY clauses are needed in the query, or if they can be resolved via index access.

例如，查询中需要ORDER BY或GROUP BY语句，或者它们能通过指数访问解决。

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An index only scan is an index access that is not followed by a table access because the index itself contains all the requested data.

仅扫描索引是未包含表访问的索引访问，因为索引本身包含了所有被请求的数据。

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There are some non-industry organizations that have made massive strides in pharmaceutical transparency, such as the Access to Medicines Index, funded by the Gates Foundation.

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What they will find is a richer experience that offers granular insight into fitness, sleep and food patterns, a real-time updating social feed, a dynamic emoticon, usage insights and access to a searchable caloric index.

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The index combines five measures: available resources, access to water, people's capacity to afford and organise water supplies, use of water for domestic, industrial and environmental purposes, and environmental management.

ECONOMIST: Measure for measure | The